What is the abbreviated electron configurations of :
a) MO 4+
b) As 3-
c) S 2-
D) NI 2+
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b) [Ar]4s^23d^104p^6
To determine the abbreviated electron configurations of the given ions, we need to first identify the element and its atomic number. The atomic numbers are:
a) MO 4+:
To find the element with the atomic number for MO, we refer to the periodic table. The atomic number of MO is 42, which corresponds to the element Molybdenum. Since MO 4+ has a positive charge, it means that it has lost 4 electrons from its neutral state. Therefore, we need to determine the electron configuration of the neutral Molybdenum (Mo) atom.
The electron configuration of a neutral Molybdenum atom (Mo) is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d⁴ 5p⁶.
To create the abbreviated electron configuration, we find the noble gas that comes before Molybdenum on the periodic table, which is Krypton (Kr) with the electron configuration of [Kr] 5s² 4d⁴ 5p⁶. We replace this noble gas configuration with [Kr] in the electron configuration of Molybdenum.
Therefore, the abbreviated electron configurations of MO 4+ is [Kr] 4d⁴.
b) As 3-:
The atomic number of As (Arsenic) is 33. Since As 3- has a negative charge, it has gained 3 electrons from its neutral state.
The electron configuration of a neutral Arsenic atom (As) is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p³.
To create the abbreviated electron configuration, we find the noble gas that comes before Arsenic on the periodic table, which is Argon (Ar) with the electron configuration of [Ar] 4s² 3d¹⁰ 4p⁶. We replace this noble gas configuration with [Ar] in the electron configuration of Arsenic.
Therefore, the abbreviated electron configurations of As 3- is [Ar] 4s² 3d¹⁰.
c) S 2-:
The atomic number of S (Sulfur) is 16. Since S 2- has a negative charge, it has gained 2 electrons from its neutral state.
The electron configuration of a neutral Sulfur atom (S) is: 1s² 2s² 2p⁶ 3s² 3p⁴.
To create the abbreviated electron configuration, we find the noble gas that comes before Sulfur on the periodic table, which is Neon (Ne) with the electron configuration of [Ne] 3s² 3p⁴. We replace this noble gas configuration with [Ne] in the electron configuration of Sulfur.
Therefore, the abbreviated electron configurations of S 2- is [Ne] 3s² 3p⁴.
d) NI 2+:
The atomic number of Ni (Nickel) is 28. Since Ni 2+ has a positive charge, it means it has lost 2 electrons from its neutral state.
The electron configuration of a neutral Nickel atom (Ni) is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁸.
To create the abbreviated electron configuration, we find the noble gas that comes before Nickel on the periodic table, which is Argon (Ar) with the electron configuration of [Ar] 4s² 3d⁸. We replace this noble gas configuration with [Ar] in the electron configuration of Nickel.
Therefore, the abbreviated electron configurations of Ni 2+ is [Ar] 3d⁸.